I believed I am not the only one needs this information. It took me ages to crack this configuration. I’ve been calling Vodafone technical support and all I can get is “I will forward you to blah blah blah…” and then no one will answer. I waited for nothing. I also sent an email to Vodafone and replied after 2 weeks which I already resolved the issue. I joined the Vodafone community and still not that helpful but I got a clue from Dylan (thanks mate!). So below is my working Cisco 1841 configuration for VodafoneNZ UFB (UltraFast Broadband or Fibre Connection with a speed of 100mbps download and 50mbps upload.)

Note:
[YOUR_ISP_GATEWAY] is an IP address, this value should be replaced, please refer to your current modem configuration.
[HOME_SERVER_IP] is my home server, forwarding all incoming request traffic to my home server. In my case, I got public/static IP address to forward all the traffic.

Since HyperTerminal was removed in Windows 7, I decided to look up on Linux tools for serial port communication and found minicom command. Here’s how to install & use it (in my case I used Linux Mint):

I believed a lot of you out there is looking for HyperTerminal on Windows 7, 8 and other latest Windows version. My usage for this HyperTerminal software is configuring Cisco Network equipments. Feel free to download this HyperTerminal from Windows XP. ^_^

I'm previously employed as I.T. instructor in Xavier University — Ateneo de Cagayan for one school year (S.Y. 2008-2009) and currently employed at Innermax Support (www.innermaxsupport.com).
I'm also into freelance and contract works ranging from Web Development, Business Solutions and Server Installations which I started since 2003.